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A comment on SpaceX Starlink average speedtest is 42.3Mbps down / 9.7 Mbps up. Parent comment

Re:SpaceX Starlink average speedtest is 42.3Mbps down / 9.7 ... by filleokus on Thursday August 27, 2020 @04:47AM (#24291422)
But if you can access to information from an exchange halfway across the world faster than others, you can definitely trade on that.
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Re:SpaceX Starlink average speedtest is 42.3Mbps down / 9.7 ... by de_watcher on Thursday August 27, 2020 @04:51AM (#24291448)
And if you can break the speed of light, you don't need a second exchange.
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Re:SpaceX Starlink average speedtest is 42.3Mbps down / 9.7 ... by garmaine on Thursday August 27, 2020 @05:08AM (#24291541)
It’s quite easy to “break” the speed of light in fiberoptic glass.
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Re:SpaceX Starlink average speedtest is 42.3Mbps down / 9.7 ... by de_watcher on Thursday August 27, 2020 @05:39AM (#24291754)
But it's not that useful even if you pour a glass cube over the whole exchange to slow it down.
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Re:SpaceX Starlink average speedtest is 42.3Mbps down / 9.7 ... by peteretep on Thursday August 27, 2020 @06:57AM (#24292336)
> It’s quite easy to “break” the speed of light in fiberoptic glass.

I don’t understand this, why? Does light travel faster than the speed of light in fibre optic glass?

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Re:SpaceX Starlink average speedtest is 42.3Mbps down / 9.7 ... by Dylan16807 on Thursday August 27, 2020 @07:24AM (#24292538)
"the speed of light in fiberoptic glass" is the thing being broken.
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